Materials Literature
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Abstract This study covers the preparation and characterization of perlite‐filled polypropylene (PP). The compositions of 15, 30, and 50 % by weight perlite–PP composites were prepared by melt‐mixing. The PP used in this study was either applied in the virgin form or γ‐irradiated in air at the doses of 10, 25, 50, and…
Local proton dynamics in several kinds of perovskite-type high-temperature protonic conductors were investigated by spectral hole burning spectroscopy. Spectral holes based on light-induced protonic motion were observed. By applying a temperature-cycling technique, the potential barriers for local protonic motion, whi…
A series of combined type thermotropic liquid crystalline (LC) poly(oxy-1,4-phenyleneoxyterephthaloyl)s bearing pendant cholesterol moieties attached to the backbone through oxyalkyleneoxy groups (hexamethylene, octamethylene, decamethylene, and dodecamethylene) of varying length, have been synthesized anew. And their…
Spectral properties of the tetrapyrrolidinyl PNP-lariat ether, L, and its complexes with K+, Na+, and Ag+ were investigated. Crystal structures of L and its complex with potassium iodide [KL]I were determined. Protonation constants of the ligand and formation constants of its complexes with Ag+, K+, and Na+ in aqueous…
This paper examines the use of direct nonradiative energy transfer (DET) experiments to determine the interface thickness in films of symmetric poly(styrene- b -methyl methacrylate) (PS−PMMA) block copolymers. The films were prepared from mixtures of two polymers of identical length and compositions, labeled at their…
The experimental heat capacity of ${\mathrm{Na}}_{8}{\mathrm{Si}}_{46}$ has been determined from 35--300 K, and its lattice parameters have been measured over the range 100--330 K. The experimental heat capacity and the thermal-expansion coefficient are compared with theoretical lattice-dynamical calculations for ${\m…
The composition ( φ ) and temperature dependence ( T ) of the monomeric friction factor ( ζ ) has been examined for styrene (S) and methyl methacrylate (MMA) in five SMMA diblock copolymers and the corresponding homopolymers. In all cases the degree of polymerization was approximately 150, sufficiently low to ensure t…
Abstract The mechanism of adhesive bonding of rubber to metal using an interlayer of bonding agent (adhesive) is discussed with respect to various physical and chemical events such as adsorption at the metal surface, chemical crosslinking within the adhesive, interdiffusion, and formation of interpenetrating networks…
Abstract Cellulose furoate was synthesized via heterogeneous and homogeneous reactions. Cotton cellulose and wood cellulose were used. Lithium chloride/dimethylacetamide solvent was used to dissolve the cellulose for the homogeneous reaction. The esterification reaction between cellulose and 2‐furoyl chloride was syst…
The physical and chemical properties of PAMAM-AT dendrimers' interior were investigated using the fluorescent, solvatochromic probe phenol blue. In aqueous solutions of each generation studied except G0, two discrete dye populations were clearly observed. PAMAM-AT dendrimers were shown to form a tight, nonpolar associ…
Different poly(ammonium) salts with various chemical structures were self-assembled by the layer-by-layer method with a synthetic hectorite, Laponite. Using X-ray reflectometry, we show that internal order is present in all multilayers. The structure of the polycation slightly modulates the spatial extent of order in…
Potentiometric titrations of the mixtures of lanthanide(III) perchlorates and bis-Tris propane (BTP) reveal formation of dinuclear hydroxo complexes M2(BTP)2(OH)n(6-n), where M = La(III), Pr(III), Nd(III), Eu(III), Gd(III), and Dy(III) and n = 2, 4, 5, or 6, in the pH range 7-9. ESI-MS data confirm the presence of din…
Compounds [Mn(dca)2bipym] (1), [Cu2(dca)4bipym] (2), and [Mn2(dca)4bipym] (3) have been synthesized and structural (2, 3) and magnetically characterized. Compound 1 is isomorphous with [Mn(dca)2bipy]. Compound 2 crystallizes in the monoclinic P2(1)/c space group, Z = 4, with a = 7.5609(9), b = 11.477(42), and c = 11.7…
Abstract The rigid amorphous phase, the low temperature melting endotherm, and their development with thermal treatment in poly(ethylene terephthalate) (PET) were investigated by means of modulated differential scanning calorimetry. The differential of the reversing heat capacity and nonreversing heat flow signals wer…
Changes of crystallinity and unit cell parameters for a low-density polyethylene as a consequence of cross-linking by dicumyl peroxide and by electron beam irradiations are compared. Polyethylene samples cross-linked by irradiation in the solid state present variations essentially only of the a unit cell parameter whi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAdsorption of Nanocolloidal SiO2 Particles on PEO BrushesR. A. Gage, E. P. K. Currie, and M. A. Cohen StuartView Author Information Laboratory of Physical and Colloidal Chemistry, Wageningen University, Dreijenplein 6, 6703 HB Wagen…
Heat capacities of the spin crossover complex [Fe(2-pic)3]Cl(2)*MeOH (2-pic: 2-picolylamine or 2-aminomethylpyridine) were measured with an adiabatic calorimeter between 12 and 355 K. A broad heat capacity peak, starting from approximately 80 K, culminating at approximately 150 K, and terminating at approximately 250…
Abstract A series of poly(ester amide)s were synthesized by solution polycondensations of various combinations of p ‐toluenesulfonic acid salts of O,O′ ‐bis(α‐aminoacyl)‐1,4:3,6‐dianhydro‐ D ‐glucitol and bis (p ‐nitrophenyl) esters of aliphatic dicarboxylic acids with the methylene chain lengths of 4–10. The p ‐tolue…
Abstract Maleated natural rubber (MNR) was prepared and used as a blending composition and a compatibilizer for blending of natural rubber (STR 5L) and cassava starch. The melt rheological behavior in terms of Mooney viscosity, apparent shear stress, and shear viscosity at 100°C were quantified. We found that the pure…
This paper highlights the significant changes introduced with the F-revision of MIL-STD-810, "Test Method Standard for Environmental Engineering Considerations and Laboratory Tests." The major emphasis on test tailoring presented in Part One of the document is described. Significant features of each test method in Par…